Component locating device



1968 D. G. MACKEY 3,410,955

KCQMPONENT LOCATING DEVICE Filed June 29, 1964 3 Sheets-Sheet 1'INVENTOR 201mm G MACKEY ATTORN EY Nov. 12, 1968 Filed June 29, 1964 D.G. MACKEY COMPONENT LOCATING DEVICE 3 Sheets-Sheet 2 l l U l Ng/y AINVENTOR Dav/n0 6i MACKEY 31M KM ATTORN EY Nov. 12, 1968 D. G; MACKEYCOMPONENT LOCATING DEVICE 3 Sheets-Sheet 5 Filed June 29, 1964 INVENTOR.Do/vnm 61. MAC/(5! ATTORNEY United States Patent 3,410,955 COMPONENTLOCATING DEVICE Donald G. Mackey, Seneca Falls, N.Y., assignor toSylvania Electric Products Inc., a corporation of Delaware Filed June29, 1964, Ser. No. 378,693 7 Claims. (Cl. 178-7.8)

ABSTRACT OF THE DISCLOSURE Orientation means for facilitating thelocation of a plurality of electron beam control components on theexterior of a cathode ray tube envelope relative to the electron guncontained therein, whereof an array of related insulative visualindicators are predeterminately spaced from one another and a commonreference and adhered to the exterior surface of the tube envelope.

This invention relates to the discrete placement of operationalcomponents on the exterior of an electron discharge device and moreparticularly to means for externally locating beam control components onthe neck of a cathode ray tube relative to the electron gun encompassedtherein.

In the utilization of cathode ray tubes in commercial and entertainmentapplications it is necessary to accurately position several beam controlcomponents on the neck of the tube relative of specific parts of the gunstructure located therein. These components, while positioned externallyof the tube, function through the glass of the neck portion to influencethe operation of the electron gun. For example, with reference to colorcathode ray tubes as utilized in television receivers and alliedapplications, typical components such as a deflection yoke, a dynamicradial convergence device, a purity magnet structure, and a blue lateralmagnet assembly are formed for orientation on the neck of the tube toinfluence the functioning of the electron gun contained therein. Thelocation of the yoke being forward on the neck of the tube adjacent theflare is usually achieved without undue trouble; but the accuratepositioning of the other abovementioned individual components is moretroublesome and time consuming since part of the gun structure isobscured by an internal opaque coating. Thus a certain amount of trialand error for location adjustment is necessary to achieve the optimumoperational results.

Accordingly, it is an object of the invention to providean inexpensivelocating device for orienting the beam control components on theexterior of a cathode ray tube relative to the electron gun positionedtherein.

A further object is to provide rapid and accurate adjustment of the beamcontrol components on the neck of the tube.

An additional object is to provide facile forming of the device on theneck of the tube.

The foregoing objects are achieved in one aspect of the invention by theprovision of a plastic sleeve formed to slip-fit the neck of the tubeand be adheringly attached to the neck adjacent the base. An array ofpredetermined cutouts in the sleeve-type device provide a uniquecontrivance having visual indicators to serve the special purpose ofaffording accurate placement of the various control components.

For a better understanding of the present invention, together with otherand further objects, advantages, and capabilities thereof, reference ismade to the following disclosure and appended claims in connection withthe accompanying drawings in which:

FIGURE 1 is a partial plan view of a color cathode ray tube with theexternal control components oriented by an embodiment of the invention;

3,410,955 Patented Nov. 12, 1968 "Ice FIGURE 2 is a partial view of theclosure portion of the tube showing an alternate base;

FIGURE 3 is a plan view showing an overlay embodiment of the invention;

FIGURE 4 is a partial perspective view showing an-.

other embodiment of the invention;

FIGURE 5 is a partial plan view showing another embodiment of theinvention;

FIGURE 6 is a partial plan view illustrating a template for forminganother embodiment of the device;

FIGURE 7 is a partial plan view showing a tape embodiment of theinvention; and

FIGURE 8 is a plan view showing means for forming the tape embodiment ofthe invention.

There is shown in FIGURE 1 a partial view of a color cathode ray tube 11having a constrictive neck portion 13 and a terminal closure 15 to whicha base 17 is attached. in FIGURE 2, a wafer type base 17 is shown seatedagainst closure 15 with the tube pins 18 extending therethrough. Forpurpose of clarity, the internally positioned electron gun structureencompassed Within the neck portion is not shown. Likewise not shown, isan opaque coating applied to the internal wall of the tube, whichextends substantially into the neck portion thereof partially obscuringthe gun structure therein. Several electron ibeam control components 19such as, the deflection yoke 21, the radial convergence device 23, thepurity magnet structure 25, and the blue lateral magnet assembly 27 arediscretely oriented on the exterior of neck portion 13 to provide thenecessary control influences for desired tube operation. As previouslymentioned, yoke 21 is easily positioned on the forward portion of neck13, but the positioning of the remaining components is facilitated by anorientation aid.

A component locating device 29 in the form of a plastic, treated paper,or fiber, sleeve-like structure is accurately positioned on neck portion13 being referenced from closure 15 or base 17 or 17. The sleeve device29 has a plurality of predeterrninately circumferentially orientedcutouts 31, 33, 35 to facilitate the precise placement of the externalcontrol components 23, 2 5, and 27, respectively. The locating device 29may contain additional cutouts 37 to facilitate heat radiation from theinterior of the tube or to afford a view of the lower portion of theelectron gun structure. The invention is not restrictive to the numberof cutouts.

As aforementioned, the positioning of the device is referenced from theterminal closure 15 of the tube or the base 17 or 17'. Since theinternal electron gun is located accurately with respect to the closure15, which is actually the stern wafer of the gun mount structure,referencing the device from the closure or the base enables accuratepositioning of the control components relative to the gun elements. Thuswhen the components are positionally referenced from the base, they arealso indirectly referenced from the closure which is specifically seatedtherein. For example, with reference to FIGURE 1, for a color cathoderay tube such as type 21CYP22, the edge of the locating device 29 islbutted against the top edge of base 17. The reference distance A fromthe base to the centerline of the circumferentially situated cutouts 35is nominally 1.406 inches. Accurate placement of the blue lateral magnetassembly 27 is achieved by positioning this component substantially overthe centerline of cutouts 65, i.e., reference distance A denotes thepositioning for assembly 27. Reference distance B from the centerline ofcutouts 35 to the centerline of cutouts 33 is nominally 0.813 inch.Cutouts 23 facilitate precise positioning for purity magnet structure25. Reference distance C from the centerline of cutouts 33 to thecenterline of cutouts 35 is nominally 0.813 inch. Cutouts 33 isnominally 0.813 inch. Cutouts 33 facilitate vergence device 23. Whilethe cutouts as illustrated in FIGURE 1 are somewhat wider than thecomponents placed thereover, there is no need for them to be as such.Preferably, the cutouts should be of a width suificient to accommodateplacement of the respective components. The shape of the cutouts and theplurality thereof are not material to the invention. The importantcriteria are that the cutouts be positioned for accurate placement ofthe individual components and allow for necessary circumferentialadjustment of the same. As can be evidenced in FIGURE 1, it is feasibleto have the locating device 29 as an integral part of base 17.

The construction of the locating device is of an insulative materialsuch as plastic, treated paper, or glass, cellulose or synthetic fibersthat will ably withstand the temperatures encountered in that portion ofthe tube without chemical deterioration or detrimental dimensionaldeviation. It has been found that tube operative temperatures on thesurface of the neck 13 are substantially within the range of 1-10 to 180degrees Fahrenheit. The device may have rigidity being formed as acylinder or it may be as a flexible snug-fitting sleeve capable of beingbonded to the neck 13. While several suitable materials have beenmentioned, plastic will be considered in this description.

A flexible type of overlay device 29" is shown in FIG- URE 3 which isadaptable to wrap-around application on the neck of the tube. Theaforementioned materials are suitable for this embodiment. The cutouts31', 33, 35', and 37 are similar to those described for locating device29. It has been found that overlay device 29' may be successfullyfabricated from Mylar polyester film as manufactured by E. I. du Pont deNemours and Co. (Inc.), Wilmington, Delaware. The gauge of the materialis not critical, but it should have suflicient body to maintain shapeduring application. An adhesive backing is beneficial for adherence.

Another embodiment is shown in FIGURE 4 wherein a plastic partialoverlay 39, having pluralities of circumferentially oriented cutouts 41,43, 45, and 47 therein, is formed to partially encircle the neck 13.This partial overlay device may be rigidly formed to match the contourof the neck, or it may be of flexible wrap-around construction. Suitablematerials are plastic, treated paper, or glass, cellulose or syntheticfibers. The location of the overlay device 39 is referenced from thebase 17 as aforedescribed and may be bonded to the neck 13 by a suitableadhesive or retained by one or more adhesive bands 49.

Another embodiment of the device 50 may be in the form of discretelyplaced visual means or pairs of circumferential markings 51, 53, andsuitably disposed on the neck 13 of the tube 11 to designate componentpositioning thereon. As shown in FIGURE 5, these markings are ofsubstantially elongated shape but they need not be as such nor. do theyneed to be disposed completely about the circumference of the neck ofthe tube. Arcuate disposal of a minimum number suflicient to indicatecomponent positioning is satisfactory. The radial convergence device 23is positioned between the pairs 51; the purity magnet 25 between pairs53 and the blue lateral magnet 27 between pairs 55.

These or similar markings may be applied by decalcomania, marking rollertechnique, or by use of a template 57 as illustrated in FIGURE 6. Thistemplate is preferably of flexible material such as paper, metal orplastic capable of being formed about neck 13. There are pairs ofperforations 59, 61, and 63 oriented to pro- 'vide circumferentialmarkings 51, 53, and 55 on the neck of the tube when a marking substancesuch as ink or paint is suitably applied by conventional means notshown. Edge 58 of template 57 is positioned adjacent the base 17.Reference distances A, B, and C are similar to reference distances A, B,and C as described for FIGURE 1. While pairs of marks are shown for eachelement of the locating device 50, a single series of marks can beutilized to position each component. In this instance, the componentwould cover the single marks or be positioned adjacent thereto. Theshown and described marks are not to be considered as limiting.

Another embodiment 60 of the locating device is shown in FIGURE 7wherein tape or band means 61 and 63 are adhesively bonded to the neck13 of tube 11 in precise locations to designate the locations of thethree aforementioned components 23, 25, and 27. The tapes or bands 61and 63 are of plastic, suitable paper or treated glass, cellulose orsynthetic fabrics and may advantageously have markings or legends 71imprinted or embossed thereon to facilitate usage. A minimum of twobands are necessary to properly locate the three components 23, 25, and27. The bands may completely encircle the neck or they may be partialencirclements in the form of armate tapes. This embodiment of the deviceis intended to include any combination or plurality of bands that areindicative of component placement. The three components 23, 25, and 27shown in FIGURE 7 are oriented by reference distances A, B, and C asdescribed for the embodiment in FIGURE 1. Bands 61 and 63 are ofspecific widths to allow for the placement of the respective componentsadjacent the edges thereof, i.e., convergence device 23 is buttedcontiguous to the designated edge of band 61; bands 61 and 63 areseparated by a distance that is substantially the width of purity magnet25 which is positioned therebetween; and the blue lateral magnet 27 islocated adjacent the proper edge of band 63.

A method for discretely applying bands 61 and 63 to the neck of the tube11 is facilitated by a tape dispensing device 65 as illustrated inFIGURE 8. This application device is constructed to place the respectivebands in proper relationship for designating component positioning inaccordance with the component reference dis tances A, B, and C shown inFIGURE 7. The tube 11 is placed in cradle 67, and the closure 15 isseated in rotatable socket 69. The bands or tapes 61 and 63 are appliedby attaching the ends of the tapes to the neck 13 of the tube 11 whichis suitably rotated by belt until sufficient lengths of the tapes areadhered to the neck. The tapes are then severed by conventional meansnot shown.

While various embodiments of a component locating device has beendescribed wherein three components are oriented, the scope of theinvention is intended to include the location of one or more components.

Thus, there is provided a component locating device that facilitatesrapid and accurate placement of individual components on the neck of acathode ray tube. The device is inexpensive to manufacture and apply,and its utilization promotes the achievement of color cathode ray tubeinstallation and adjustment efiiciencies that have been heretoforeunattained.

While there have been shown and described what are at present consideredthe preferred embodiments of the invention, it will be obvious to thoseskilled in the art that various changes and modifications may be madetherein without departing from the invention as defined by the appendedclaims.

What is claimed is:

1. In combination with a cathode ray tube having a terminal closureadjacent to a constrictive neck portion wherein at least one electrongun is encompassed, means for orienting a plurality of electron beamcontrol components relative to the exterior of said neck portioncomprising:

an array of a plurality of related insulativevisual indicatorspredeterminately spaced in a longitudinal manner from one another and acommon reference and adhered to the exterior surface of said neckportion to become an external portion thereof to facilitate accurateplacement of said subsequently positioned control components on saidneck portion relative to said internal gun.

2. Component orientation means according to claim 1 wherein said commonreference for the spacing of said visual indicators is said terminalclosure of said tube.

3. Component orientation means according to claim 1 wherein said arrayof visual indicators comprises specific pluralities of relatedcircumferential markings longitudinally spaced from one another and saidcommon reference and exteriorly adhered to said neck portion.

4. Component orientation means according to claim 1 wherein said arrayof visual indicators comprises a plurality of related insulativecircumferential markings longitudinally spaced from one another and saidcommon reference and exteriorly adhered to said neck portion.

5. Component orientation means according to claim 1 wherein said meansof visual indication comprises at least one band of insulative materialexternally adhered to said neck portion and predeterminately spacedrelative to said reference.

6. Component orientation means according to claim 1 wherein said arrayof visual indicators is in the form of an overlay having specificpluralities of circumferentially related cutouts longitudinally spacedfrom one another, said overlay being oriented relative to said commonreference.

7. Component orientation means according to claim 6 wherein said overlayis a sleeve-like structure formed for external adherence to said neckportion.

References Cited UNITED STATES PATENTS 5/1951 Smith 335212 8/1958 Fehr29-2516 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No.3,410,955 November 12, 1968 Donald G. Mackey It is certified that errorappears in the above identified patent and that said Letters Patent arehereby corrected as shown below:

Column 1, line 29, "of", second occurrence, should read to Column 3,lines 1 and 2, "Cutouts 33 is nominally 0.813 inch. Cutouts 33facilitate vergence device 23." should read Cutouts 31 designateaccurate positioning for the radial convergence device 23.

Signed and sealed this 3rd day of March 1970.

(SEAL) A ttest:

Edward M. Fletcher, Jr. WILLIAM E. SCHUYLEB, JR.

Attesting Officer Commissioner of Patents

